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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2020-03-24 13:34:57 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-04-14 09:13:19 +0200 |
| commit | 1813487725e85b6ca0b64e03965e6ac4f56e556e (patch) | |
| tree | 2191ccff47cc1a1c27d11de918b08a2969411dc5 /include/spi | |
| parent | ef46f2db0001d4d5b66ddd34346aa36625dbf452 (diff) | |
| download | barebox-1813487725e85b6ca0b64e03965e6ac4f56e556e.tar.gz barebox-1813487725e85b6ca0b64e03965e6ac4f56e556e.tar.xz | |
spi: validate spi messages
This adds __spi_validate() to validate spi messages. This function is a
stripped down version from the Kernel. The motivation for adding this
was to fill in xfer->bits_per_word from spi->bits_per_word so that a
spi bus driver can use the former.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include/spi')
| -rw-r--r-- | include/spi/spi.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/spi/spi.h b/include/spi/spi.h index 48a90bcca7..66e0500d04 100644 --- a/include/spi/spi.h +++ b/include/spi/spi.h @@ -126,6 +126,7 @@ struct spi_message; * SPI slaves, and are numbered from zero to num_chipselects. * each slave has a chipselect signal, but it's common that not * every chipselect is connected to a slave. + * @max_speed_hz: Highest supported transfer speed * @setup: updates the device mode and clocking records used by a * device's SPI controller; protocol code may call this. This * must fail if an unrecognized or unsupported mode is requested. @@ -171,6 +172,9 @@ struct spi_controller { */ u16 num_chipselect; + /* limits on transfer speed */ + u32 max_speed_hz; + /* setup mode and clock, etc (spi driver may call many times) */ int (*setup)(struct spi_device *spi); |